RT info:eu-repo/semantics/article T1 Towards a hierarchical approach for autotuning task-based libraries A1 Cámara Moreno, Jesús A1 Cuenca Muñoz, Javier A1 Boratto, Murilo K1 Programación de ordenadores K1 Ingeniería de sistemas K1 Tecnología de la información K1 Ajuste automático jerárquico K1 Computación heterogénea K1 Programación basada en tareas K1 1203 Ciencia de Los Ordenadores K1 3304 Tecnología de Los Ordenadores AB This work proposes a hierarchical approach to reduce the training time of task-based routines by reusing previously obtained autotuning information. This approach has been integrated into a working prototype of Chameleon, a dense linear algebra software whose tile-based routines are executed on the available computational resources by means of a runtime system. The results show that this approach provides a high degree of scalability to the entire self-optimization process, achieving a reduction in training time of up to 80% and an appropriate selection of values for the adjustable parameters. PB Springer Nature SN 0920-8542 YR 2026 FD 2026 LK https://uvadoc.uva.es/handle/10324/83751 UL https://uvadoc.uva.es/handle/10324/83751 LA eng NO The Journal of Supercomputing, 2026, vol. 82, n. 5, artículo 271. NO Producción Científica DS UVaDOC RD 24-mar-2026